int nKeys = keys.size();
      int[] deltas = new int[nKeys];
      Operation[] operations = Operation.values();
      for (int i = 0; i < iterations; i++) {
        int keyIndex = random.nextInt(nKeys);
        String key = keys.get(keyIndex);
        Operation op = operations[random.nextInt(operations.length)];
        switch (op) {
          case ADD:
            {
              int delta = random.nextInt(10);

```Python hl_lines="18  22"
{!../../docs_src/additional_responses/tutorial001.py!}
```

/// note | "Nota"

Lembre-se que você deve retornar o `JSONResponse` diretamente.

///

/// info | "Informação"

A chave `model` não é parte do OpenAPI.

O **FastAPI** pegará o modelo do Pydantic, gerará o `JSON Schema`, e adicionará no local correto.

O local correto é:

有了它，你可以直接与**FastAPI**一起使用 <a href="https://docs.pytest.org/" class="external-link" target="_blank">pytest</a>。

## 使用 `TestClient`

/// info | "信息"

要使用 `TestClient`，先要安装 <a href="https://www.python-httpx.org" class="external-link" target="_blank">`httpx`</a>.

例：`pip install httpx`.

///

导入 `TestClient`.

通过传入你的**FastAPI**应用创建一个 `TestClient` 。

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{
  "name": "k8s-pod-network",
  "cniVersion": "0.3.1",
  "pugins": [
    {
      "type": "calico",
      "etcd_endpoints": "http://10.110.0.136:6666",
      "plugin_log_level": "info",
      "mtu": 1500,
      "ipam": {
        "type": "calico-ipam"
      },
      "policy": {
        "type": "k8s"
      },
      "kubernetes": {
        "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {

	} DfsEnumInfo;

	typedef struct {
		uint32_t level,
		[switch_is(level)] DfsEnumInfo e;
	} DfsEnumStruct;

	[op(0x15)]
	int NetrDfsEnumEx([in,string,unique] wchar_t dfs_name,
			[in] uint32_t level,
			[in] uint32_t prefmaxlen,
			[in,out,unique] DfsEnumStruct *info,
			[in,out,unique] uint32_t *totalentries);

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/portal": {
                "get": {
                    "summary": "Get Portal",
                    "operationId": "get_portal_portal_get",

    with TestClient(app) as client:
        response = client.get("/openapi.json")
        assert response.status_code == 200, response.text
        assert response.json() == {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},
            "paths": {
                "/items/{item_id}": {
                    "get": {
                        "responses": {
                            "200": {

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/{item_id}": {
                "put": {
                    "responses": {
                        "200": {

def test_openapi_schema():
    client = TestClient(app)
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/users/me": {
                "get": {
                    "responses": {
                        "200": {